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Spot of Tea Designs

Spot of Tea Designs

DIY Foam Number Party Decor

in Birthday, Celebrations, Crafts & DIY

Attention: Party DIYers! I’ve got the key to a large scale party backdrop accessory that makes a big impact and is affordable and it’s made with foam sheets and paper napkins! Keep reading for more step by step instructions on how to make a DIY Foam Number for any party theme.

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

DISCLOSURE: Some of the links in this post contain affiliate links, which come at no cost to you. Know that I only promote products I personally use and stand behind. To learn more about my affiliates, please review my disclosure policy.

My very good friend (also a crafty mom named Tara!) just turned 40! While she was hosting the party at her house, her family, our fellow bestie mom, Amy and I wouldn’t let her do any of the party prep or decor so we stepped in.

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

I’ve seen those fun large scale foam letters and numbers before and decided to give it a try!

DIY Foam Number Supplies:

  • Large Foam Sheets (each number took 2 sheets which I got at Dollar Tree!)
  • Paper Napkins (both these numbers took 1 pack of lunch napkins from Party City)
  • Large Ruler
  • Hot Glue Gun and Sticks
  • Craft Knife
  • Pencil
DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

I’ve seen a lot of places on pinterest and etsy that offer printable templates you can download, assemble and use for these large scale numbers but I just decided to draw my own right on the boards. Tip: replace your blade for crisp cuts!

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

Now it’s time to start building the sides of your DIY Foam Number. Mine were all 4 inches wide but you could easily make your own widths.

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

For curved shapes, like in the number 0, use a pencil to make marks every inch along your 4 inch wide foam piece. Use a craft knife and ruler to slice along the mark, making sure to not go through the piece completely. This will allow you to easily curve your piece, as seen above.

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

Use hot glue to attach these straight and curved sides along the edge of your template to create the shell of your DIY foam number.

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

Next, stuff with your colorful material of choice. I most often see these with small 5″ balloons but I was working to make this in advance of our spring break trip, so I decided to fill it with napkins! Yep, I bought a large pack of 2 ply lunch napkins, unplied them all while watching tv on night, then scrunched and glued them into the number shell.

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

The number 4 isn’t the most stable shape when standing alone, so I created these stands. On party day, we simply taped the stands on the back and used river rocks on the flat party to stay.

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

How awesome do these look at the party?

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

And here’s a photo reference of the birthday girl (hey, it’s 2 crafty Taras!) standing next to these large scale party pieces.

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

If you couldn’t tell the party theme was simply “purple” and “40” so this DIY Balloon Arch was the perfect match for the selfie station. I got the kit off Amazon and loves the mix of matte, metallic, and confetti filled purple balloons, all with the included balloon strip. We used the same method as we did for my party 35th anniversary to include photos in the backdrop on ribbon strips.

DIY Foam Number Decor - Cheap Party DIY. Make any letter or number! | Spotofteadesigns.com

This is your final push to try a DIY foam number decor piece since this piece of large scale party decor cost around $10 to make! See it in action on my instagram reel!

DIY foam number board - 40th birthday party | spotofteadesigns.com

A few weeks later this same number 40 was transformed for another birthday when they borrowed my bases and added their own black napkins in it!

40th Birthday DIY Kentucky Derby Party | bar setup | spotofteadesigns.com

I made another a year later using black foam board. Tip: The Dollar Tree boards still have a white core so the edges can easily be covered with a Sharpie! See it made here on my instagram!

DIY foam number decor - number 70 in black and gold | spotofteadesigns.com

That original 0 was borrowed AGAIN and new black and gold napkins were added with a brandy new number 7 I made with the same technique! And yep, you can see me make it again on THIS instagram reel!

DIY Foam Board Party Decor - Cross for Communion | spotofteadesigns.com

Tara and I also used these same steps to create a cross shape with coffee filters inside for her daughter’s communion the following year! See that in progress on THIS instagram reel!

Check out the back to school photo backdrop version I made wrapped in Oly Fun!

Foam board Apple Photo Prop covered with OlyFun from @FairfieldWorld #ad | spotofteadesigns.com
Stitch People Frame for 40th birthday gift | spotofteadesigns.com

On a sentimental note, I created a cross stitch portrait of her family of 6 using the Stitch People reference book I’ve used many times in the past. Special thanks to my friends at Custom Picture Frames for partnering with me on this piece, including this gifted Magano style mahogany wood frame. Use code SPOTOFTEADESIGNS20 to get 20% off your custom framing order!

Related Posts

DIY 40th Birthday Party Decorations - photo garland | spotofteadesigns.com
40th Birthday party recap - diy dry terrarium class | spotofteadesigns.com
40 before forty - final results on this short term bucket list - cake topper | spotofteadesigns.com
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Tips to using a t-shirt ruler guide: - Press your Tips to using a t-shirt ruler guide:
- Press your shirt first to get out any wrinkles and moisture
- Lay down your tshirt ruler at the top neck
- Lightly fold your vinyl piece in half to find the center and center it on the guide
- REMOVE the guide before your place your press cloth and heat
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Comment GUIDE if you want a link to this helpful vinyl t-shirt accessory.
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